Yellow high silica glass
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United States of America Patent
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Apr 5, 1994
Issued Date -
N/A
app pub date -
Jun 28, 1993
filing date -
Apr 6, 1992
priority date (Note) -
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Abstract
A yellow color by transmitted light is produced in a high silica glass by impregnating a porous, high silica glass with a solution of chromium and zinc salts and consolidating the glass under oxidizing conditions to dope the glass with chromium and zinc oxides, the chromium being predominantly in the hexavalent state. Optionally, an aluminum salt is included in the impregnating solution. The glass has particular utility as a filter for lighting purposes.
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